Her: Hey. Want pho?

Me: Sure, have a spot in mind?

Her: 'local shop name'

Me: Sure, what time? I'm off at 2.

No response for hours. I misinterpreted, didn't realize she was going for something spontaneous. I genuinely was not free until 2. I sent her a screenshot of how I much I killed it trading today after markets closed at 2, probably a mistake. What should I have done differently?